I modified two Ikea units to fit the space behind the door to my craft room. The depth is more than normal - 8.5" deep. I need all the storage I can get so I used every inch of space. To add additional shelves between the units, I drilled the pre-existing holes completely through. Sanding and painting the new shelves was the most time consuming part of the project. Not fun - its HOT outside, people! LOL Read more: http://www.splitcoaststampers.com/gallery/photo/2647204#ixzz3g8svpKut